Difference between revisions of "Cum definim operatorii binari ?"

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Ca pe orice functie binara, dar numele ei il veti scrie punind numele operatorului in paranteza rotunda.
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Ex:
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suma :: Int -> Int -> Int
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suma a b = a + b
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poate deveni
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(+++) :: Int -> Int -> Int
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(+++) a b = a + b
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iar cu o declaratie [[infix]] precizati asociativitatea si nivelul de prioritate al operatorului.
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Varianta: puteti folosi o functie binara obisnuita ca un operator infixat punandu-i numele intre `apostroafe inverse`.
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Ex:
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3 `suma` 4
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va calcula tot : suma 3 4 adica 3 + 4 cf. def. de sus.

Revision as of 15:17, 6 February 2021

Ca pe orice functie binara, dar numele ei il veti scrie punind numele operatorului in paranteza rotunda.

Ex:

suma :: Int -> Int -> Int suma a b = a + b

poate deveni

(+++) :: Int -> Int -> Int (+++) a b = a + b

iar cu o declaratie infix precizati asociativitatea si nivelul de prioritate al operatorului.


Varianta: puteti folosi o functie binara obisnuita ca un operator infixat punandu-i numele intre `apostroafe inverse`.

Ex:

3 `suma` 4

va calcula tot : suma 3 4 adica 3 + 4 cf. def. de sus.

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